Warming system for syringes



Jan. 7, 1941. R. c. ANGELL WARMING SYSTEM FOR SYRINGES Filed Aug. 3, 1940 mm IIIIIIIIIIHIH lll llllllllllllllllllllllllll :1

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Gttorucg Patented Jan. 7, 1941 UNITED STATES PATENT OFFICE WARMING SYSTEM FOR SYRINGES Application August 3, 1940, Serial No. 356,771

Claims.

My invention relates particularly to that class of devices that are employed to warm the fluid to be ejected from a syringe such as is generally employed by the dental profession to flush out the cavities of teeth, and is especially directed to a system whereby the flow of warm fluid may be prolonged, and is a continuation in part of my application Serial No. 266,174, flied April 5, 1939.

The principal objects of my invention are to provide a heated holder for a warm water syringe having a substantial fluid reservoir contained within the syringe handle whereby the fluid contained in said syringe may be warmed by induction from said heated holder.

Other objects of my invention are to provide a warm water syringe with means connected with a source of water supply through a water heating reservoir remote from said syringe but with which it may be connected by a substantial length of flexible tubing sufiicient to permit the syringe to be withdrawn from its heated holder for convenient use in treating a patient.

My invention further includes a syringe having its connecting flexible tubing of relatively small bore diameter, sheathed by an outer tubing serving as a heat insulator for the fluid conveying inner tubing, and both said tubings being connected with said water heating reservoir and syringe through connectors each having relatively 2O coaxial nipples to which said inner and outer tubings may be convenientlyconnected in substantially concentric relation.

My invention also includes such an arrangement of the syringe, its heated holder and water heated reservoir, that the water in the reservoir in the syringe handle is tempered by the water contained in the tubing, which is followed by the warmed water in the heated reservoir, so that water exuding from the syringe nozzle will 40 be of substantially constant temperature."

Specifically stated, the form of my invention as hereinafter more definitely described comprises a cylindrical holder for the syringe and is composed of concentric tubing with an interposed heating element, conveniently mounted on the cuspidor supporting arm 01 a dental equipment unit, and through which said syringe extends when not in use in connected relation through flexible tubing with a heated water reservoir which is connected with a source of water supply.

My invention also includes all of the various novel features of construction and arrangement a as hereinafter more definitely specified.

In the accompanying drawing, Figure 1 is a side elevatlonal view of a. cuspidor supporting arm upon which the syringe and its heated holder is conveniently mounted, said cuspidor supporting arm being rotatably supported upon an equip- 5 ment standard of which a fragment only is illustrated for simplification of illustration; Fig. 2 is a vertical longitudinal sectional view of the syringe holder and a fragment of the supporting arm illustrated in Fig. 1; and Fig. 3 is an en- 10 larged side elevational view of the syringe shown in Fig. 1 with a. portion including its handle and hose-pipe connections being shown in section for convenience of illustration.

In said figures, the cuspidor supporting arm I 15 is mounted to rotate about the axis of the equipment supporting standard 2, and carries the cuspidor 3, and the warm water syringe holder 5 which normally supports the syringe 6 when not in use.

The handle portion 1 of said syringe 6 depends into the bore of the syringe holder 5 and is connected by the flexible hose-pipe 9, disposed in the loop Ill, with the valve 12 having the controlling knob l3 and which valve is connected by the pipe 25 IS with the water heater l6.

Said water heater I5 is connected by the pipe l'l, fitting l3, and flexible tubing with a suitable source of water supply, and embodies the 0 electric heating unit 22 having the electric current conducting lead-in wires 23 and 25 connecting it to a suitable source of electric power.

As shown in section in Fig. 2, the syringe holder 5 comprises the outer cylindrical shell 26, having the base 21 mounted on the top wall of the cuspidor supporting arm i and having the syringe supporting bushing 29 from which depends the concentric inner tubular casing 30 of said syringe holder 5.

The syringe holder 5 is provided with the heating element 32 preferably in the form of a spirally coiled wire disposed in the annular space 33 between the shell 26 and the tubular casing 30 and connected through the insulated screws 36 and 31, in the cuspidor supporting arm frame 39 and the lead-in wires 40 and 4| with a suitable source of electric current supply.

As shown in Fig. 3, the syringe comprises the valve housing 50, having the valve controlling thumb actuated lever 49, dispensing nozzle 5| and handle 52 which includesa water reservoir 53 of substantial volume which is connected through the connector 55 and dual hose-pipes I and 56 with the valve l2.

Rmaybeherenotedthatthebose-pipe not smallbore diameterandisadaptedtoccnvey the'warmed water irom the water heater I! to the reservoir II in the handle l2, while the outer hose-pipe tubing 0 is provided to heat insulate the hose-pipe it and thereby conserve the heat or the water passing therethrough from the water heater It.

Referring again to Fig. 3, the connector I is provided with the relatively coaxial nipples II and ill, the hose-pipe tubing I being attached to the nipple N by wrapped ligatures II, and the hose-pipe 56 being attached to the nipple III by wrapped ligatures I.

My invention is advantageous in that the water in the reservoir of the handle of the syringe is heated by induction from the heated holder while the syringe is not in use so that when said syringe is withdrawn from said holder for use, and the thumb actuated lever depressed to open the valve in the valve housing, the warm water in the reservoir 53 will be tempered by the cooler water in the hose-pipe until the warmed water in the water heater l8 reaches the syringe reservoir to continue the warm water flow through the syringe.

I do not desire to limit my invention to the precise details of construction and arrangement as herein set forth, as it is obvious that various modifications may be made therein without departing from the essential features of my invention as defined in the appended claims.

Having thus described my invention, I claim:

1. A heating system for warm water syringes comprising a heater holder in which the syringe is supported when not in use, and a water heater remote from said heated holder with which said syringe is connected by flexible hose-pipe.

and syringe whereby water is conveyed from said water heater to said syringe thro h said heated holder.

3. The combination with a heated holder for asyringe whennotinme.otasyringehavinga water reservoir in its handle removably supported in said holder, a water heater, a valve controlled outlet ior said water heater, a hose-pipe connection between said water heater outlet and syringe, permitting withdrawal of said syringe from said holder while connected with said water heater.

4. The combination with a heated holder for a syringe when not in use, of a syringe having a water reservoir in its handle removably supported in said holder, a water heater, a valve controlled outlet for said water heater, a hosepipe connection between said water heater outlet and syringe, permitting withdrawal oi said syringe from said holder while connected with said water heater, and a thumb actuated valve in said syringe.

5. The combination with a heated holder for a syringe when not in use, of a syringe having a water reservoir in its handle removably supported in said holder, 0. water heater, a valve controlled outlet for said water heater, a dual hose-pipe connection between said water heater outlet and syringe, permitting withdrawal of said syringe from said holder while connected with said water heater.

ROBERT C. ANGELL. 

